64499198400 has 1008 divisors, whose sum is σ = 292758595584. Its totient is φ = 13601157120.

The previous prime is 64499198377. The next prime is 64499198443. The reversal of 64499198400 is 489199446.

It is a happy number.

64499198400 is a `hidden beast` number, since 6 + 4 + 49 + 9 + 198 + 400 = 666.

It is a tau number, because it is divible by the number of its divisors (1008).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 35379889 + ... + 35381711.

Almost surely, 2^64499198400 is an apocalyptic number.

64499198400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64499198400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146379297792).

64499198400 is an abundant number, since it is smaller than the sum of its proper divisors (228259397184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64499198400 is a wasteful number, since it uses less digits than its factorization.

64499198400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880 (or 1853 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 64499198400 in words is "sixty-four billion, four hundred ninety-nine million, one hundred ninety-eight thousand, four hundred".